This occurred to me when I came home after seeing the movie, and was listening to Hans ZImmer's score. I'm not saying the cues we hear in the movie are slowed down. Zimmer appears to be using Piaf's song as a foundation for extrapolation. This phenomenon may be obvious to a lot of you out there, but this video serves as a way for people to hear them side by side and to visualize and understand what Zimmer is doing with the score.